CN101568091B - Method, system and equipment for providing service - Google Patents

Abstract

The invention discloses a method, system and equipment for providing services, belonging to the communication field. The method includes: the terminal obtains a network instruction; the terminal initiates a call in the circuit switching domain CS according to the network instruction; the circuit switching domain CS receives the call of the terminal and provides services. The system includes: sending equipment, terminal equipment and service providing equipment. The terminal device includes: an acquisition module and a processing module. The present invention provides network entities with increased functions (such as enhanced VMSC, enhanced P-CSCF, etc.), and realizes that the terminal can still provide emergency call services and monitor calls for terminal users under the session establishment mode using ICCP signaling. business.

Description

A method, system and device for providing services

technical field

The present invention relates to the communication field, in particular to a method, system and equipment for providing services.

Background technique

With the development and maturation of network technology, IMS (IP Multimedia Subsystem, IP Multimedia Subsystem) as a new form of multimedia services has received widespread attention from people, and it can meet the newer and more diverse demands of current end customers. Multimedia business needs. IMS is considered to be the core technology of the next-generation network, and it is also an important way to solve the convergence of mobile and fixed networks and introduce differentiated services such as triple convergence of voice, data, and video. IMS is a subsystem superimposed on the existing PS (Packet Switched, Packet Switched) domain in the mobile switching network. The PS domain is used as the bearer channel for upper layer control signaling and media transmission, and SIP (Session Initiation Protocol, Session Initiation Protocol) as a service control protocol, utilizes the characteristics of SIP's simplicity, easy expansion, and convenient media combination, and provides rich multimedia services by separating service control from bearer (such as media stream data, voice data, video data, etc.) control. Among them, the main functional entities in IMS include:

CSCF (Call Session Control Function) entity is responsible for controlling user registration, session control and other functions;

AS (Application Server, application server), responsible for providing various business logic control functions;

HSS (Home Subscriber Server) is responsible for centralized management of user subscription data;

MGCF (Media Gateway Control Function, Media Gateway Control Function)/IM-MGW (IP Multimedia Media Gateway, IMS Media Gateway), responsible for realizing intercommunication with the circuit switching network;

During the evolution of the network to IMS, there will be a situation where the CS (Circuit Switched, Circuit Switched) domain and the IMS domain coexist. See Figure 1, which provides a schematic diagram of the ICS (IMS Centralized Service, IMS centralized service control) architecture. In order to realize service control During the interaction between the UE (User Equipment, user terminal) and the IMS network service control entity, a new entity ICCF (IMS CS Control Function, IMS circuit domain control function entity) is added in the IMS network to complete the UE access through the CS domain The signaling adaptation function to the IMS network, and the merging function of session control signaling and media control signaling.

Wherein, the session control signaling between UE and ICCF is collectively referred to as ICCP (IMS CS Control Protocol, IMS Circuit Domain Control Protocol) signaling (or I1 signaling for short). In particular, it should be pointed out that:

1) When the UE accesses the IMS through the PS domain, the ICCP signaling may specifically be called I1-PS signaling, specifically the SIP protocol.

2) When the UE accesses the IMS through the CS domain, the ICCP signaling can be specifically called I1-CS signaling; it can be USSD (Unstructured Supplementary Service Data, unstructured supplementary data service), SMS (Short Message Service, short message service), DTMF (Dual Tone Multiple Frequency, Dual Tone Multiple Frequency), etc.

When the UE accesses the IMS through the CS domain and the PS domain at the same time, the UE sends an I1-PS (session request invite) message carrying the called number to the opposite end, and at the same time, the UE sends a session establishment Set up message to establish the bearer of the session. The sessions are merged in the ICCF, and then the ICCF sends the session to the IMS instead of the terminal, making the IMS see it as a normal IMS session.

When the UE accesses through the CS domain, there is also a session establishment process similar to the above, except that the I1-PS message needs to be replaced by the I1-CS message.

It can be seen from the above-mentioned user session establishment process in the ICS that session control signaling (ICCP) and bearer control signaling are performed separately, and finally merged in the ICCF at the home site. When the user establishes a session through I1-PS, since the called number carried in the Setup message is ICCF PSI (routing address of ICCF) during the bearer establishment process, the VMSC (Visit Mobile Switch Center, visiting mobile switching center) cannot pass The called number analysis perception is an emergency call and the called number that provides the session for monitoring, resulting in the inability to provide emergency services and monitoring services; and during the establishment of session control signaling, because it is carried in the CS domain, the PS domain core network, such as SGSN (Serving General Packet Radio Service Support Node, Serving General Packet Radio Service Support Node), GGSN (Gateway General Packet Radio Service Support Node, General Packet Radio Service Support Gateway) cannot obtain the media flow of the user plane, nor can they provide emergency services and monitoring services. Similarly, when the session is established through I1-CS, although the I1-CS signaling messages pass through the VMSC, the VMSC only transparently transmits these messages and does not analyze the content of the messages, so the VMSC also cannot know the called Number, therefore, also cannot provide emergency service and interception service.

Contents of the invention

In order to realize that the terminal can still provide emergency call service and monitoring service for the terminal user under the session establishment mode using I1, the embodiment of the present invention provides a method, system and equipment for providing the service. Described technical scheme is as follows:

Among them, a method of providing services, the method includes:

The terminal obtains the network indication;

The terminal initiates a call in the circuit-switched CS domain according to the network instruction;

The call of the terminal received by the circuit switched CS domain provides services;

The service is an emergency call service, and the network instruction is specifically:

After the proxy call session control function entity P-CSCF judges that the emergency call service needs to be provided and that the session request message is I1-PS according to the number and identifier carried in the session request message initiated by the terminal, the P-CSCF sends the notification that the conversation is an emergency call;

Correspondingly, the terminal obtaining the network indication also includes:

According to the notification, the terminal decides not to use ICCP signaling to establish the session.

A method of providing a service, the method comprising:

The terminal obtains the network indication;

The terminal initiates a call in the circuit-switched CS domain according to the network instruction;

The circuit switching CS domain receives the call of the terminal and provides services;

The service is an emergency call service, and the network instruction is specifically:

After the proxy call session control function entity P-CSCF judges that the emergency call service needs to be provided according to the number and identifier carried in the session request message initiated by the terminal and the session request message is I1-PS, it sends an unsolicited message to the terminal. The IP Multimedia Subsystem Circuit Domain Control Protocol (ICCP) signaling is used to establish the session.

Among them, a system for providing services, the system includes: a delivery device, a terminal device, and a service providing device;

The sending device is configured to send a network instruction to the terminal device;

The terminal device is configured to initiate a call to the service providing device in the circuit-switched domain CS after obtaining the network instruction issued by the issuing device;

The service providing device is configured to provide a service after receiving a call from the terminal device;

The delivery device is specifically a P-CSCF;

The P-CSCF is configured to, according to the number and identifier carried in the session request message initiated by the terminal device, determine that an emergency call service needs to be provided and that the session request message is I1-PS, and then send a different message to the terminal device. Notification of session establishment using ICCP signaling;

Correspondingly, the terminal device specifically includes:

A sending module, configured to send a session request message to the P-CSCF, where the session request message carries a number and an identifier;

A processing module, configured to receive a notification sent by the P-CSCF, and initiate an emergency call to the service providing device in the circuit-switched CS domain;

or

The delivery device is specifically a P-CSCF;

The P-CSCF is configured to, according to the number and identifier carried in the session request message initiated by the terminal device, determine that an emergency call service needs to be provided and that the session request message is I1-PS, and then send the notification that the conversation is an emergency call;

Correspondingly, the terminal device specifically includes:

A sending module, configured to send a session request message to the P-CSCF, where the session request message carries a number and an identifier;

A processing module, configured to receive the notification sent by the P-CSCF, decide not to use ICCP signaling to establish a session, and initiate an emergency call to the service providing device in the circuit switched CS domain;

or

The delivery device is specifically a P-CSCF;

The P-CSCF is configured to receive the session request message sent by the terminal device, the session request message carries user data and identification, and according to the preset user controlled data and the user information carried in the session request message After judging that the monitoring service needs to be provided and judging that the session request message is an I1-PS according to the identifier, a notification is sent to the terminal device to establish a session without using ICCP signaling.

Wherein, a sending device, the sending device is used to send a network instruction to the terminal device;

The delivery device is specifically a P-CSCF;

The P-CSCF is configured to receive the session request message sent by the terminal device, and after judging that the emergency call service needs to be provided and the session request message is I1-PS according to the number and identifier carried in the session request message, sending a notification to the terminal device that the session is not established using ICCP signaling;

or,

The P-CSCF is configured to receive the session request message sent by the terminal device, and after judging that the emergency call service needs to be provided and the session request message is I1-PS according to the number and identifier carried in the session request message, sending a notification that the session is an emergency call to the terminal device;

or,

The P-CSCF is configured to receive a session request message sent by the terminal device, and determine that a monitoring service needs to be provided and that the session After the request message is I1-PS, a notification of establishing a session without using ICCP signaling is sent to the terminal device.

Among them, a terminal device, the terminal device includes:

an acquisition module, configured to acquire network indication;

A processing module, configured to initiate a call in the circuit switched domain CS after the obtaining module obtains the network indication;

The terminal equipment specifically includes:

A sending module, configured to send a session request message to the P-CSCF, where the session request message carries a number and an identifier;

An acquisition module, configured to acquire a notification sent by the P-CSCF that does not use ICCP signaling to establish a session;

A processing module, configured to initiate an emergency call in the circuit switched CS domain after the obtaining module obtains the notification;

or;

The terminal equipment specifically includes:

A sending module, configured to send a session request message to the P-CSCF, where the session request message carries a number and an identifier;

An obtaining module, configured to obtain a notification that the P-CSCF sends the session as an emergency call;

A processing module, configured to decide not to use ICCP signaling to establish a session after the obtaining module obtains the notification, and initiate an emergency call in the circuit-switched CS domain;

or;

The terminal equipment specifically includes:

A sending module, configured to send a session request message to the P-CSCF, where the session request message carries user data and an identifier; the user data includes one or more of called number, calling number, terminal identifier, and location information;

An acquisition module, configured to acquire a notification sent by the P-CSCF that does not use ICCP signaling to establish a session;

A processing module, configured to initiate a call in the circuit switched CS domain after the obtaining module obtains the notification.

The beneficial effects of the technical solution provided by the embodiments of the present invention are:

When a terminal user uses ICCP signaling to establish a session and needs to provide an emergency call or monitoring service, the network entity (such as enhanced VMSC, enhanced P-CSCF, etc.) that provides additional functions sends a message to the terminal not to use ICCP signaling Establish a session (or the session is an emergency call, or refuse terminal access activation) and other network instructions. After the terminal obtains the above network instructions, it initiates a session call in the circuit-switched CS domain, and the circuit-switched CS domain provides the user with an emergency call or The monitoring service realizes that the terminal can still provide the terminal user with the emergency call service and the monitoring service in the session establishment mode using ICCP signaling.

Description of drawings

FIG. 1 is a schematic diagram of an ICS architecture provided by the prior art;

Fig. 2 is a flow chart of the method for providing services provided by Embodiment 1 of the present invention;

Fig. 3 is a schematic diagram of information interaction of the method for providing services provided by Embodiment 1 of the present invention.

FIG. 4 is a flowchart of a method for providing services provided by Embodiment 2 of the present invention;

Fig. 5 is a schematic diagram of information interaction of the method for providing services provided by Embodiment 2 of the present invention.

FIG. 6 is a flowchart of a method for providing services provided by Embodiment 3 of the present invention;

Fig. 7 is a schematic diagram of information interaction of the method for providing services provided by Embodiment 3 of the present invention.

FIG. 8 is a flowchart of a method for providing services provided by Embodiment 4 of the present invention;

Fig. 9 is a schematic diagram of information interaction of the method for providing services provided by Embodiment 4 of the present invention.

FIG. 10 is a flowchart of a method for providing services provided by Embodiment 6 of the present invention;

Fig. 11 is a schematic diagram of information interaction of the method for providing services provided by Embodiment 6 of the present invention.

Fig. 12 is a flowchart of a method for providing services provided by Embodiment 7 of the present invention;

Fig. 13 is a schematic diagram of information interaction of the method for providing services provided by Embodiment 7 of the present invention.

Fig. 14 is a schematic diagram of a system for providing services provided by Embodiment 9 of the present invention;

Fig. 15 is a schematic diagram of a terminal device provided by Embodiment 11 of the present invention.

Detailed ways

The embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Those skilled in the art can know that when a user uses a terminal UE to access the network, there is a need to initiate an emergency call at any time, or the network needs to monitor the user. The content of the method provided by the embodiment of the present invention is as follows: the terminal obtains the network indication; the terminal initiates a call in the circuit-switched CS domain according to the network indication; the circuit-switched CS domain receives the call from the terminal and provides services. business. In this way, the terminal can still provide the emergency call service and the monitoring service for the terminal user under the session establishment mode using I1.

The method for providing services provided by the embodiments of the present invention will be described in detail below with multiple embodiments, wherein, embodiments 1 to 4 are descriptions for providing emergency services as an example, and embodiments 5 to 7 are based on For the description of providing monitoring services as an example, see the following embodiments for details:

Example 1

Referring to FIG. 2 , an embodiment of the present invention provides a method for providing services. Taking the schematic diagram of the ICS architecture provided in FIG. 1 as an example, and taking the provision of emergency call services as an example for illustration, when the UE accesses the IMS through the PS domain, the The content of the method is as follows:

101: When the UE accesses the IMS network through the PS domain, it initiates a PDP context activation request message, and the APN (Access PointName, access node name) carried in the PDP (Packet Data Protocol, packet data protocol) context activation request message is the IMS pre-configured Address of the configured GGSN.

Wherein, when the UE accesses the IMS through the PS domain, before establishing the session, the UE will send a PDP context activation request message, and the PDP context activation request message will carry an APN address identifier assigned by the IMS network, That is, the address of the GGSN.

102: After receiving the PDP context activation request message initiated by the UE, the SGSN in the PS domain judges that the APN of the UE is not the local GGSN.

Wherein, since the GGSN address carried in the PDP context activation request message is allocated by the IMS network, it is inconsistent with the identification of the local GGSN address of the SGSN, and the SGSN judges that the access path of the UE at this time is intended to be accessed through the PS domain. into the IMS network.

103: The SGSN returns a context activation rejection message to the UE.

104: After receiving the context activation rejection message from the SGSN, the UE initiates a call to establish a session in the CS domain, so as to provide the user with an emergency call service in the CS domain.

Referring to Figure 3, it is a schematic diagram of information interaction of the service provision method provided by this embodiment. When the UE accesses the IMS through the PS domain, before initiating session establishment, the SGSN in the PS domain judges that the APN of the UE is a non-local GGSN, and rejects The activation request of the UE, so that the UE can still provide the emergency call service for the user in the session establishment mode using the I1-PS.

Example 2

Referring to FIG. 4 , an embodiment of the present invention provides a method for providing services. Taking the schematic diagram of the ICS architecture provided in FIG. 1 as an example, and providing an emergency call service for users as an example, when a terminal accesses the IMS through the PS domain, The content of the method is as follows:

201: The terminal UE sends a session request message invite, where the session request message invite carries an emergency call number and a call identifier I1-PS;

Wherein, when the terminal UE accesses the IMS through the PS, since the I1 signaling between the UE and the IMS is specifically the I1-PS, specifically the SIP protocol, the UE sends the session request message through the SIP protocol. For example, the user's emergency call is "110", and after obtaining the "110" input by the user, the terminal UE sends a session request message invite carrying "110" and the I1-PS identifier to the P-CSCF at the current location.

202: After receiving the session request message, the P-CSCF acquires the call identifier I1-PS carried in the session request message, and learns that the carried number is an emergency call number through number analysis;

Among them, when the P-CSCF receives the session request sent by the UE, it judges that the session message is I1-PS according to the obtained call identifier I1-PS, and judges that it is an emergency number after number analysis according to the obtained number, and obtains the call identifier The process of judging by I1-PS and obtaining the number is not in order. It can be judged as I1-PS first, and then judged as emergency call; it can also be judged as emergency call first, and then judged as I1-PS. The specific order of determination is not limited. In addition, the P-CSCF can perform number analysis by matching the obtained number with the pre-stored emergency number. If the match is successful, it means that the obtained number is an emergency number. The embodiment of the present invention also does not limit the P-CSCF to perform number analysis. The specific implementation used.

203: The P-CSCF returns a session response message to the UE, and the content carried in the session response message is to notify the UE not to use the I1-PS signaling to establish a session.

204: After receiving the session response message returned by the P-CSCF, the UE learns that the session is not established using the I1-PS signaling.

Wherein, in step 203, when the P-CSCF returns the session response message to the UE, the session request message may also carry information informing the terminal UE that this session is an emergency call; correspondingly, in step 204, when the UE After receiving the session response message returned by the P-CSCF, it is judged that this session is an emergency call, and it is decided not to use I1-PS signaling to establish this session.

205: The UE initiates a call in the CS domain, and the VMSC in the CS domain analyzes the call sent by the UE and the number carried in it to determine that it is an emergency call, and then forwards the call to the nearest emergency call center.

Wherein, in this step 205, when the UE initiates a call in the CS domain, the emergency call identifier may also be carried in the call. Correspondingly, the VMSC in the CS domain does not need to perform number analysis after receiving the call from the UE, and only needs to The emergency call identifier carried in the mobile terminal directly forwards the call to the emergency call center, thus successfully achieving the purpose of providing emergency call services for users when the terminal uses the I1-PS session establishment mode.

Wherein, this embodiment is not limited to the manner in which the I1-PS identifier is carried in the UE sending the session request message in step 201, and the specific setting is based on the deployment requirements of the system, for example, some special identifiers in the session request message indicate that the The session is an I1-PS, not by carrying the I1-PS identifier. For example, if a certain field in the invite of the session request message is empty, such as the SDP (Session Description Protocol, Session Description Protocol) field is empty, when the P - The CSCF judges that the session is an I1-PS by judging that the SDP is empty. Moreover, the identifier of I1-PS in the embodiment of the present invention indicates that the session is I1-PS. On the other hand, the identifier can also indicate that the session uses CS bearer (because usually using I1-PS is to use CS bearer), so P - The CSCF does not reserve bearer resources for this session.

Referring to Fig. 5, it is a schematic diagram of information interaction of the service provision method provided by this embodiment. When the UE accesses the IMS through the PS domain, the P-CSCF determines that the session request carries the I1-PS identifier and the emergency call number, and then notifies the UE I1 is not used for this session, so that the UE can still provide the emergency call service for the user in the session establishment mode using the I1-PS.

Example 3

Referring to FIG. 6, an embodiment of the present invention provides a method for providing services. Taking the schematic diagram of the ICS architecture provided in FIG. 1 as an example, and providing an emergency call service for users as an example, when the terminal accesses the IMS through the CS domain, Taking I1-CS signaling as USSD as an example, the content of the method is as follows:

301: The UE sends a session request message to the VMSC through the USSD, where the session request message carries an emergency number.

302: The VMSC receives the session request message sent by the UE, and after parsing the message, learns that the session is an emergency call and the session request message is I1-CS according to the type of the session request message and the number carried in it.

Wherein, the VMSC receives the session request message sent by the UE, analyzes the emergency number carried in the message, and learns that the call is an emergency call.

303: The VMSC returns a session response message to the UE, where the session response message is used to notify the UE that this session is an emergency call.

304: The UE receives the session response message returned by the VMSC, knows that the call is an emergency call, and decides not to use I1 signaling to establish a session, but to initiate an emergency call in the CS domain.

Wherein, in step 303, when the VMSC returns a session response message to the UE, the session response message may also carry information notifying the UE not to use I1 signaling to establish a session; correspondingly, in step 304, when the UE receives the VMSC After returning the session response message, an emergency call is directly initiated in the CS domain.

305: The VMSC judges that the call initiated by the user is an emergency call, so as to provide the user with an emergency call service.

Wherein, when the UE initiates a call in the CS domain, the emergency call identifier can also be carried in the call. Correspondingly, the VMSC in the CS domain does not need to perform number analysis after receiving the call from the UE. Call ID, forward the call directly to the emergency call center, thus successfully achieving the purpose of providing emergency call services for users when the terminal uses the I1-CS session establishment mode.

Referring to FIG. 7, it is a schematic diagram of information interaction of the service provision method provided by this embodiment.

When the UE accesses the IMS through the CS domain, after judging that the emergency number is carried in the session request through the VMSC, the UE is notified that the call is an emergency call, so that the UE can still serve the user in the session establishment mode using I1-CS. Provide emergency call business purposes.

Those skilled in the art can know that when the I1-CS signaling is implemented through DTMF or SMS, the method is similar and will not be repeated here.

Example 4

Referring to Fig. 8, the embodiment of the present invention provides a method for providing services. When the terminal UE accesses the IMS through the CS domain, the UE obtains the information of the current network issued by the OTA Server (Over The Air Server, air transfer server). The emergency call number, thereby realizing the purpose of providing emergency call services for users, wherein the content of the method is as follows:

401: The UE enters the current network and performs a normal CS domain location update process;

402: After the OTA Server perceives the location update of the UE, it sends the emergency call number of the current network to the UE through an SMS message.

Among them, the OTA Server sends the pre-stored emergency call numbers of the current network, such as 119, 110, 120, etc., to the UE entering the current network through SMS messages.

403: The UE obtains and saves the emergency call number of the current network.

404: The UE obtains the emergency call number input by the user, and after matching with the saved emergency call number of the current network, perceives that it is an emergency call.

405: The UE initiates an emergency call in the CS domain, and the emergency call carries an emergency call identifier. After receiving the emergency call, the VMSC forwards the call to the nearest emergency call center according to the emergency call identifier carried therein.

Wherein, in this step, when the UE initiates an emergency call in the CS domain, the emergency call identifier may not be carried. Instead, after the VMSC receives the emergency call, it performs number analysis to obtain that the call is an emergency call, thereby determining that the user initiates an emergency call. After an emergency call, the call is forwarded to the nearest emergency call center to provide users with emergency call services.

Referring to Figure 9, it is a schematic diagram of information interaction of the service provision method provided by this embodiment. When the UE accesses the IMS through the CS domain, after the emergency call number of the current network is issued to the UE through the OTAServer, the UE initiates an emergency call in the CS domain. In this way, the UE can still provide the user with an emergency call service in the manner of establishing a session by using I1.

The above is just an example of the combination of OTA server and VMSC. As a functional entity, OTA Server can also be a separate device, or it can be set up together with HLR/HSS.

In summary, the embodiment of the present invention provides a detailed description of how to provide emergency call services for users under the session establishment mode of the terminal UE using ICCP signaling; the following embodiments will use ICCP signaling for the terminal UE In the session establishment mode, how to implement the monitoring service of the user will be described, see the following embodiments for details.

Example 5

The embodiment of the present invention provides a method for providing a service. The call monitoring service is taken as an example for illustration. When the UE accesses the IMS through the PS domain, similar to Embodiment 1, before the UE initiates I1 to establish a session, the SGSN finds that the Monitor the user, and the APN is not the local GGSN, so return the activation rejection request to the UE. After the UE receives the activation rejection request from the SGSN, the UE initiates a call in the CS domain and establishes a session, thereby realizing the activation of the user in the CS domain. monitor.

Example 6

Referring to FIG. 10 , an embodiment of the present invention provides a method for providing services. Taking the schematic diagram of the ICS architecture provided in FIG. 1 as an example, and taking the provision of monitoring call services as an example for illustration, when the UE accesses the IMS through the PS domain, the The content of the method is as follows:

601: The terminal UE sends a session request message invite, where the session request message invite carries the calling number and the call identifier of I1-PS;

602: After receiving the session request message sent by the UE, the P-CSCF judges that the session needs to be monitored according to the calling number, and judges that the session is to be established through I1 signaling according to the call identity I1-PS.

Wherein, this embodiment does not limit the order in which it is determined that the UE needs to be monitored according to the calling number, and it is determined that the session is to be established through I1 signaling according to the call identity I1-PS.

Moreover, this embodiment does not limit the specific judgment method adopted when judging the monitoring service, and only uses the judgment based on the calling number of the user as an example for illustration. In this embodiment, the determination may also be made according to one or more of the user's calling number, called number, terminal identifier, and terminal current location information.

603: The P-CSCF returns a session response message to the UE, and the content carried in the session response message is to notify the UE not to use the I1-PS signaling.

604: After receiving the session response message, the UE learns that the session is not established using the I1-PS signaling.

605: The UE initiates a call in the CS domain, so as to provide an interception service in the CS domain.

Wherein, when the UE initiates a call in the CS domain, the VMSC in the CS domain obtains the caller and called party information of the session and the media information of the session according to the call sent by the UE, so as to monitor the UE.

This embodiment is described by taking the UE that initiates the call as an example of the monitoring target object. Those skilled in the art can know that when implementing the monitoring service, the called number can also be used as the monitoring target object. Correspondingly, in step 602, After receiving the session request message sent by the UE, the P-CSCF judges that it needs to monitor according to the carried called number. The location information of the UE may also be used as the monitoring target object. Correspondingly, in step 602, the P-CSCF judges that the user needs to be monitored according to the current location information of the UE carried in the session request message invite sent by the terminal UE.

In this embodiment, when the terminal is not in the local network of the P-CSCF, that is, after the SGSN judges that the APN carried in the PDP context activation request initiated by the terminal does not belong to the local APN, the APN of the terminal is converted to the local APN.

Referring to Figure 11, it is a schematic diagram of information interaction of the service provision method provided by this embodiment. When the UE accesses the IMS through the PS and CS domains, the P-CSCF judges that service monitoring is required, and notifies the UE not to use I1 signaling to establish a session. Furthermore, the UE initiates a call in the CS domain, so that the UE can still provide monitoring services in the session establishment mode using I1-PS.

Example 7

Referring to FIG. 12 , an embodiment of the present invention provides a method for providing services. Taking the schematic diagram of the ICS architecture provided in FIG. 1 as an example, and taking the provision of monitoring call services as an example for illustration, when the UE accesses the IMS through the CS domain, the The content of the method is as follows:

701: The UE sends a session request message to the VMSC through the USSD, where the session request message carries the called number.

702: After receiving the session request message sent by the UE, the VMSC judges that the session request message is I1-CS and judges that it needs to monitor the user.

Wherein, this embodiment does not limit the specific judgment method adopted when judging the monitoring service, and only uses the judgment according to the called number of the user as an example for illustration. In this embodiment, the determination may also be made according to one or more of the user's calling number, called number, terminal identifier, and terminal current location information.

703: The VMSC returns a session response message to the UE, where the session response message is used to notify the UE not to use the I1-CS in this session.

704: The UE receives the session response message returned by the VMSC, and establishes a session without using I1-CS signaling.

705: The UE initiates a call in the CS domain, thereby providing monitoring services in the CS

Wherein, when the user initiates a call in the CS domain, the visited network obtains the caller and called party information of the session and the media information of the session through the VMSC, thereby realizing the monitoring service.

Referring to Figure 13, it is a schematic diagram of information interaction of the service provision method provided in this embodiment. When the UE accesses the IMS through the CS domain, the VMSC judges that the user needs to monitor the service, and notifies the UE not to use I1 signaling to establish a session, and then The UE initiates a call in the CS domain, so that the UE can still provide monitoring services in the session establishment mode using I1-CS.

Example 8

The embodiment of the present invention provides a method for providing a service, which is described by taking the monitoring call service as an example. Similar to the method provided in Embodiment 4, before the UE initiates I1 to establish a session, when the UE enters the current network, it executes a normal CS When the location of the domain is updated, the OTA server senses that it needs to monitor the user, and sends an instruction to the terminal, notifying the terminal not to use ICCP when establishing a session, but to initiate a session in the CS domain;

In specific implementation, the user data can be carried in the location update message initiated by the UE, and then when the OTA server receives the location update message sent by the UE, it can judge whether it needs to monitor the user according to its own preset user controlled data , if yes, send a notification to the UE not to use ICCP to establish a session.

Wherein, the above-mentioned user data may specifically be one or several of the user's calling number, called number, terminal identification, and terminal current location information. Correspondingly, the user-controlled data preset by the OTA server itself may be based on the system It can be configured according to requirements, for example, it can be one or more of the calling number, called number, terminal identification, and terminal current location information. This embodiment does not limit the specific judgment method adopted when judging the interception service.

In this embodiment, the OTA server sends a notification not to use ICCP to establish a session, which can also achieve the purpose that the UE can still provide monitoring services in the session establishment mode using I1-CS.

Example 9

Referring to Fig. 14, an embodiment of the present invention provides a system for providing services, and the system includes: a delivery device, a terminal device, and a service providing device;

Sending devices, used to send network instructions to terminal devices;

The terminal device is used to initiate a call to the service providing device in the CS circuit switching domain after obtaining the network instruction sent by the sending device;

The service providing device is configured to provide a service after receiving a call from the terminal device.

Wherein, when the network instruction delivery occurs before the terminal device establishes a session request, the delivery device in the system provided by the embodiment of the present invention may specifically be:

1) The SGSN is configured to receive a context activation request message sent by the terminal device, and after determining that the APN carried in the context activation request message is a non-local APN, send a context activation rejection message to the terminal device.

2) The OTA server is used to send the emergency number of the network where the terminal device is currently located to the terminal device after sensing the location update of the terminal device;

Correspondingly, the terminal equipment specifically includes:

Save module, be used for saving the emergency number of the current network issued by OTA server;

The processing module is used to obtain the number input by the user, and initiate an emergency call to the service providing device in the circuit switching CS domain after judging that the emergency call service needs to be provided according to the emergency number saved by the saving module.

3) The OTA server is used to sense the location of the terminal to update, judge that the terminal needs to be monitored, and send a notification to the terminal not to use ICCP to establish a session;

Correspondingly, the terminal equipment specifically includes:

The receiving module is used to receive the notification sent by the OTA server;

The processing module is configured to initiate a call in the circuit switched CS domain after the receiving module receives the notification.

Wherein, when the network instruction delivery occurs after the terminal device sends the session request, the delivery device in the service providing system provided by the embodiment of the present invention may specifically be:

1) P-CSCF

P-CSCF is used to send a notification to the terminal device to establish a session without using ICCP signaling after judging that emergency call service needs to be provided according to the number and identifier carried in the session request message initiated by the terminal device and the session request message is I1-PS ;

Correspondingly, the terminal equipment specifically includes:

A sending module, configured to send a session request message to the P-CSCF, where the session request message carries a number and an identifier;

The processing module is configured to receive the notification sent by the P-CSCF, and initiate an emergency call to the service providing equipment in the CS domain of the circuit switching.

or,

The P-CSCF is configured to, according to the number and identifier carried in the session request message initiated by the terminal device, determine that the emergency call service needs to be provided and the session request message is I1-PS, and then send a notification to the terminal device that the session is an emergency call;

Correspondingly, the terminal equipment specifically includes:

A sending module, configured to send a session request message to the P-CSCF, where the session request message carries a number and an identifier;

The processing module is configured to receive the notification sent by the P-CSCF, decide not to use the ICCP signaling to establish the session, and initiate an emergency call to the service providing equipment in the CS domain of the circuit switching.

or;

The P-CSCF is used to receive the session request message sent by the terminal device. The session request message carries user data and identifiers. According to the preset user controlled data and the user data carried in the session request message, it is judged that the monitoring service needs to be provided and according to After the identification determines that the session request message is an I1-PS, a notification is sent to the terminal device to establish a session without using ICCP signaling.

2) VMSC;

The VMSC is configured to receive a session request message initiated by a terminal device, and, according to the type of the session request message and the number carried in the session request message, determine that emergency call service needs to be provided and the session request message is I1-CS, and then send a different message to the terminal. Notification of session establishment using ICCP signaling;

Correspondingly, the terminal equipment specifically includes:

A sending module, configured to send a session request message to VMSC, where the session request carries a number;

The processing module is configured to initiate an emergency call to the service providing equipment in the CS domain of the circuit switching after receiving the notification sent by the VMSC.

or;

The VMSC is used to receive the session request message sent by the terminal device, and according to the type of the session request message and the number carried in the session request message, determine that an emergency call service needs to be provided and the session request message is I1-CS, and then send the message to the terminal device notification that the session is an emergency call;

Correspondingly, the terminal equipment specifically includes:

A sending module, configured to send a session request message to VMSC;

The processing module is configured to receive the notification sent by the VMSC, decide not to use the ICCP signaling to establish a session, and initiate an emergency call to the service providing device in the CS domain of the circuit switching.

or;

The VMSC is configured to receive a session request message sent by the terminal device, the session request message carries user data, and judges that a monitoring service needs to be provided according to the preset user controlled data and the user data carried in the session request message, and according to the session request The type of the message, after judging that the session request message is I1-CS, sending a session establishment notification not using ICCP signaling to the terminal device.

In the system provided by the embodiment of the present invention, through the network entities with increased functions (such as enhanced VMSC, enhanced P-CSCF, etc.), it is realized that the terminal can still serve the terminal user in the session establishment mode using ICCP signaling. The purpose of providing emergency call service or monitoring service.

Example 10

An embodiment of the present invention provides a sending device, which is used to send a network instruction to a terminal device.

Wherein, when the network instruction delivery occurs before the terminal device establishes a session request, the delivery device provided by the embodiment of the present invention may specifically be:

1) SGSN: used to receive the context activation request message sent by the terminal device, and send a context activation rejection message to the terminal device after judging that the APN carried in the context activation request message is a non-local APN.

2) OTA server,

The OTA server is used to send the emergency number of the network where the terminal device is currently located to the terminal device after sensing the location update of the terminal device;

or,

The OTA server is used to sense the location update of the terminal, determine that the terminal needs to be monitored, and send a notification to the terminal not to use ICCP to establish a session.

Wherein, when the delivery of the network instruction occurs after the terminal device sends the session request, the delivery device provided in the embodiment of the present invention may specifically be:

1) P-CSCF; where,

P-CSCF is used to receive the session request message sent by the terminal equipment, and according to the number and identification carried in the session request message, after judging that the emergency call service needs to be provided and the session request message is I1-PS, send the non-ICCP message to the terminal equipment A notification to establish a session;

or,

P-CSCF is used to receive the session request message sent by the terminal device, and according to the number and identification carried in the session request message, determine that the emergency call service needs to be provided and the session request message is I1-PS, and then send the session to the terminal device as an emergency call announcement of;

or,

The P-CSCF is used to receive the session request message sent by the terminal device, and judge according to the preset user controlled data and the user data and identification carried in the session request message that the monitoring service needs to be provided and the session request message is I1-PS, Send a notification to the terminal device to establish a session without using ICCP signaling.

2) VMSC, wherein,

The VMSC is used to receive the session request message sent by the terminal device, and according to the type of the session request message and the number carried in the session request message, determine that an emergency call service needs to be provided and the session request message is I1-CS, and then send the message to the terminal device Notification of session establishment without using ICCP signaling;

or,

The VMSC is used to receive the session request message sent by the terminal device, and according to the type of the session request message and the number carried in the session request message, determine that an emergency call service needs to be provided and the session request message is I1-CS, and then send the message to the terminal device notification that the session is an emergency call;

or,

The VMSC is configured to receive the session request message sent by the terminal device, judge the need to provide monitoring services according to the preset user controlled data and the user data carried in the session request message, and judge the session request according to the type of the session request message After the message is I1-CS, send a notification to the terminal device to establish a session without using ICCP signaling.

The delivery device provided by the embodiment of the present invention realizes that the terminal can still serve End users provide emergency call services or monitor service purposes.

Example 11

Referring to Fig. 15, an embodiment of the present invention provides a terminal device, and the terminal device includes:

an acquisition module, configured to acquire network indication;

The processing module is configured to initiate a call in the circuit switched CS domain after the obtaining module obtains the network indication.

Among them, the terminal equipment provided by the embodiment of the present invention specifically includes:

The obtaining module is used to obtain and save the emergency number of the network where the terminal device is currently located after the OTA server perceives that the terminal device performs location update;

The processing module is used to obtain the number input by the user, and initiate an emergency call in the CS domain when the input number matches the emergency number saved by the obtaining module.

Or specifically include:

The receiving module is used to receive and save the notification that the OTA server does not use ICCP to establish a session;

The processing module is configured to initiate a call in the circuit switched CS domain according to the notification received by the receiving module.

Or specifically include:

A sending module, configured to send a context activation request message to the SGSN, where the context activation request message carries the APN;

An acquisition module, configured to acquire a context activation rejection message sent by the SGSN;

The processing module is configured to initiate a call in the circuit switched CS domain after the obtaining module obtains the context activation rejection message.

Or specifically include:

A sending module, configured to send a session request message to the P-CSCF, where the session request message carries a number and an identifier;

An acquisition module, configured to acquire a notification sent by the P-CSCF without using ICCP signaling to establish a session;

The processing module is configured to initiate an emergency call in the circuit switched CS domain after the obtaining module obtains the notification.

Or specifically include:

A sending module, configured to send a session request message to the P-CSCF, where the session request message carries a number and an identifier;

An acquisition module, configured to acquire a notification that the session sent by the P-CSCF is an emergency call;

The processing module is configured to determine not to use ICCP signaling to establish a session after the obtaining module obtains the notification, and initiate an emergency call in the CS domain of circuit switching.

Or specifically include:

A sending module, configured to send a session request message to VMSC, where the session request message carries a number;

An acquisition module, configured to acquire a notification sent by the VMSC without using ICCP signaling to establish a session;

The processing module is configured to initiate an emergency call in the circuit switched CS domain after the obtaining module obtains the notification.

Or specifically include:

A sending module, configured to send a session request message to VMSC, where the session request message carries a number;

An acquisition module, configured to acquire a notification that the session sent by the VMSC is an emergency call;

The processing module is configured to determine not to use ICCP signaling to establish a session after the obtaining module obtains the notification, and initiate an emergency call in the CS domain of circuit switching.

Or specifically include:

A sending module, configured to send a session request message to the P-CSCF, where the session request message carries user data and an identifier; the user data includes one or more of called number, calling number, terminal identifier, and location information;

An acquisition module, configured to acquire a notification sent by the P-CSCF without using ICCP signaling to establish a session;

The processing module is configured to initiate a call in the circuit switched CS domain after the obtaining module obtains the notification.

Or specifically include:

A sending module, configured to send a session request message to the VMSC, where the session request message carries user data; the user data includes one or more of called number, calling number, terminal identification, and location information;

An acquisition module, configured to acquire a notification sent by the VMSC without using ICCP signaling to establish a session;

The processing module is configured to initiate a call in the circuit switched CS domain after the obtaining module obtains the notification.

The terminal device provided by the embodiment of the present invention does not use ICCP signaling to establish a session after receiving a network instruction, but initiates a call in the circuit switched domain CS, thereby realizing that the terminal can still use ICCP signaling to establish a session. Provide emergency call service and monitoring service for end users.

Part of the steps in the embodiments of the present invention can be realized by software, and the corresponding software program can be stored in a readable storage medium, such as an optical disk or a hard disk.

The above descriptions are only specific embodiments of the present invention, and are not intended to limit the present invention. For those of ordinary skill in the art, any modifications, equivalent replacements, and improvements made without departing from the principles of the present invention etc., should be included within the protection scope of the present invention.

Claims (7)

1. A method for providing services, characterized in that the method comprises: The terminal obtains the network indication; The terminal initiates a call in the circuit-switched CS domain according to the network instruction; The circuit switching CS domain receives the call of the terminal and provides services; The service is an emergency call service, and the network instruction is specifically: After the proxy call session control function entity P-CSCF judges that the emergency call service needs to be provided and that the session request message is I1-PS according to the number and identifier carried in the session request message initiated by the terminal, the P-CSCF sends the notification that the conversation is an emergency call; Correspondingly, the terminal obtaining the network indication also includes: According to the notification, the terminal decides not to use ICCP signaling to establish the session. 2. The method for providing services according to claim 1, characterized in that, the identification can be realized by setting the I1-PS identification, or by setting the Session Description Protocol SDP as empty, or by setting the identification that uses the CS bearer . 3. A method for providing services, characterized in that the method comprises: The terminal obtains the network indication; The terminal initiates a call in the circuit-switched CS domain according to the network instruction; The circuit switching CS domain receives the call of the terminal and provides services; The service is an emergency call service, and the network instruction is specifically: After the proxy call session control function entity P-CSCF judges that the emergency call service needs to be provided according to the number and identifier carried in the session request message initiated by the terminal and the session request message is I1-PS, it sends an unsolicited message to the terminal. The IP Multimedia Subsystem Circuit Domain Control Protocol (ICCP) signaling is used to establish the session. 4. The method for providing services according to claim 3, characterized in that, the identification can be realized by setting the I1-PS identification, or by setting the Session Description Protocol SDP to empty, or by setting the identification that uses the CS bearer . 5. A system for providing services, characterized in that the system includes: delivery equipment, terminal equipment, and service providing equipment; The sending device is configured to send a network instruction to the terminal device; The terminal device is configured to initiate a call to the service providing device in the circuit-switched CS domain after obtaining the network instruction issued by the issuing device; The service providing device is configured to provide a service after receiving a call from the terminal device; The delivery device is specifically a P-CSCF; The P-CSCF is configured to, according to the number and identifier carried in the session request message initiated by the terminal device, determine that an emergency call service needs to be provided and that the session request message is I1-PS, and then send a different message to the terminal device. Notification of session establishment using ICCP signaling; Correspondingly, the terminal device specifically includes: A sending module, configured to send a session request message to the P-CSCF, where the session request message carries a number and an identifier; A processing module, configured to receive a notification sent by the P-CSCF, and initiate an emergency call to the service providing device in the circuit-switched CS domain; or The delivery device is specifically a P-CSCF; The P-CSCF is configured to, according to the number and identifier carried in the session request message initiated by the terminal device, determine that an emergency call service needs to be provided and that the session request message is I1-PS, and then send the notification that the conversation is an emergency call; Correspondingly, the terminal device specifically includes: A sending module, configured to send a session request message to the P-CSCF, where the session request message carries a number and an identifier; A processing module, configured to receive the notification sent by the P-CSCF, decide not to use ICCP signaling to establish a session, and initiate an emergency call to the service providing device in the circuit switched CS domain; or The delivery device is specifically a P-CSCF; The P-CSCF is configured to receive the session request message sent by the terminal device, the session request message carries user data and identification, and according to the preset user controlled data and the user information carried in the session request message After judging that the monitoring service needs to be provided and judging that the session request message is an I1-PS according to the identifier, a notification is sent to the terminal device to establish a session without using ICCP signaling. 6. A sending device, characterized in that the sending device is used to send a network instruction to a terminal device, and the sending device is specifically a P-CSCF; The P-CSCF is configured to receive the session request message sent by the terminal device, and after judging that the emergency call service needs to be provided and the session request message is I1-PS according to the number and identifier carried in the session request message, sending a notification to the terminal device that the session is not established using ICCP signaling; or, The P-CSCF is configured to receive the session request message sent by the terminal device, and after judging that the emergency call service needs to be provided and the session request message is I1-PS according to the number and identifier carried in the session request message, sending a notification that the session is an emergency call to the terminal device; or, The P-CSCF is configured to receive a session request message sent by the terminal device, and determine that a monitoring service needs to be provided and that the session After the request message is I1-PS, a notification of establishing a session without using ICCP signaling is sent to the terminal device. 7. A terminal device, characterized in that the terminal device comprises: an acquisition module, configured to acquire network indication; A processing module, configured to initiate a call in the circuit switched CS domain after the obtaining module obtains the network indication; The terminal equipment specifically includes: A sending module, configured to send a session request message to the P-CSCF, where the session request message carries a number and an identifier; An acquisition module, configured to acquire a notification sent by the P-CSCF that does not use ICCP signaling to establish a session; A processing module, configured to initiate an emergency call in the circuit switched CS domain after the obtaining module obtains the notification; or; The terminal equipment specifically includes: A sending module, configured to send a session request message to the P-CSCF, where the session request message carries a number and an identifier; An obtaining module, configured to obtain a notification that the P-CSCF sends the session as an emergency call; A processing module, configured to decide not to use ICCP signaling to establish a session after the obtaining module obtains the notification, and initiate an emergency call in the circuit-switched CS domain; or; The terminal equipment specifically includes: A sending module, configured to send a session request message to the P-CSCF, where the session request message carries user data and an identifier; the user data includes one or more of called number, calling number, terminal identifier, and location information; An acquisition module, configured to acquire a notification sent by the P-CSCF that does not use ICCP signaling to establish a session; A processing module, configured to initiate a call in the circuit switched CS domain after the obtaining module obtains the notification.

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